I'm trying to do a normal installation on a customers machine
that was heavily infected with trojans
tried to put nod32 on it[xp version]
even tried to download it from nod 32 site] was unable to finish unpacking it
and ideas
thanks

If you are unable even to unpack the exe archive, it must have not been downloaded completely, or got corrupted somehow. Since it's a WinRAR SFX archive, it's not a matter of NOD32 itself. Try turning off any download manager you may have installed (Getright, Flashget, Download acc., etc.)